High-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico

Peter K M Megaw, Joaquin Ruiz, Spencer R. Titley

Research output: Contribution to journalArticle

108 Citations (Scopus)

Abstract

The high-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico occur in thick carbonate-dominant Jurassic-Cretaceous basinal sedimentary sequences floored by Paleozoic or older crust. The districts lie within, or on the margins of, a major fold-thrust zone; structures parallel to the trends of this belt control mineralization in many districts. The deposits are characterized by irregular ore lenses that commonly reveal strong structural controls and are stratigraphically discordant. Orebodies are of three principal morphological types: mantos, chimneys, and pods and are composed of massive sulfides and/or calc-silicate skarn. Despite the variations between ore types, major similarities are seen in structural controls, host-rock characteristics, and sulfide mineralogy. Structural controls include intrusive contacts, faults, fold axes, fractures, fissures, and cavern zones. Geochemical data for the deposits are sparse but indicate strongly contrasting conditions among some of the major districts. It appears that the spectrum of mineralization styles shown by these deposits represent differing responses to variations in intrusive associations, depth of emplacement, host-rock characteristics, and geochemical evolution of the individual systems.

Original languageEnglish (US)
Pages (from-to)1856-1885
Number of pages30
JournalEconomic Geology
Volume83
Issue number8
StatePublished - Dec 1988

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structural control
Carbonates
Mexico
carbonates
Deposits
deposits
carbonate
host rock
Sulfides
mineralization
Ores
fold
sulfides
skarn
Rocks
minerals
cavern
massive sulfide
rocks
sedimentary sequence

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

High-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico. / Megaw, Peter K M; Ruiz, Joaquin; Titley, Spencer R.

In: Economic Geology, Vol. 83, No. 8, 12.1988, p. 1856-1885.

Research output: Contribution to journalArticle

Megaw, Peter K M ; Ruiz, Joaquin ; Titley, Spencer R. / High-temperature, carbonate-hosted Ag-Pb-Zn(Cu) deposits of northern Mexico. In: Economic Geology. 1988 ; Vol. 83, No. 8. pp. 1856-1885.
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